Activation of toll-like receptor-2 by endogenous matrix metalloproteinase-2 modulates dendritic-cell-mediated inflammatory responses.

Activation of toll-like receptor-2 by endogenous matrix metalloproteinase-2 modulates dendritic-cell-mediated inflammatory responses.
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DOI:
10.1016/j.celrep.2014.10.067
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发表时间:
2014-12-11
期刊:
影响因子:
8.8
通讯作者:
Bhardwaj N
Bhardwaj N
中科院分区:
生物学1区
文献类型:
--
作者:
Godefroy E;Gallois A;Idoyaga J;Merad M;Tung N;Monu N;Saenger Y;Fu Y;Ravindran R;Pulendran B;Jotereau F;Trombetta S;Bhardwaj N

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基质金属蛋白酶-2(MMP-2)参与多种生理机制,包括伤口愈合和肿瘤进展。我们发现MMP-2直接刺激树突状细胞(DC)上调细胞表面的OX 40 L并分泌炎性细胞因子。DC活化的机制包括与Toll样受体2(TLR 2)的物理结合,导致NF-κB活化,DC上的OX 40 L上调和随后的TH 2分化。值得注意的是,MMP-2在体内以TLR 2依赖性方式使T细胞向2型反应极化。MMP-2依赖的2型极化可能代表了一种关键的免疫调节机制,以防止广泛的疾病,如炎症,感染性和自身免疫性疾病,这些疾病可以被肿瘤劫持以逃避免疫。
Matrix metalloproteinase-2 (MMP-2) is involved in several physiological mechanisms, including wound healing and tumor progression. We show that MMP-2 directly stimulates dendritic cells (DCs) to both up-regulate OX40L on the cell surface and secrete inflammatory cytokines. The mechanism underlying DC activation includes physical association with Toll-like receptor-2 (TLR2), leading to NF-κB activation, OX40L up-regulation on DCs and ensuing TH2 differentiation. Significantly, MMP-2 polarizes T cells towards type-2 responses in vivo, in a TLR2-dependent manner. MMP-2-dependent type-2 polarization may represent a key immune regulatory mechanism to protect against a broad array of disorders, such as inflammatory, infectious and autoimmune diseases, which can be hijacked by tumors to evade immunity.
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